Okay, ehhm... To be honest I am not really familiar with that part of leader modding. As far as I can see you make a Star Wars mod... And you'd like to create unique diplo texts for the leaders, right? Okay, I've done this as well for my mod and I had no problems. So in general it is possible to do that. I will take a look at you file a little later. I have problems with one of my own mods as well and I have no time now. It is also a long file and I don't know where to begin, so it will take me a while.
Only one stupid question: these files are called *.xml inside your mod, right? You just renamed them before uploading them? I guess so, I can't imagine the game would have started without errors otherwise.